Nickel and nickel alloys · Сплав А494 Grade CU5MCuC / SА494 Grade CU5MCuC / N08826
Cast Alloy A494 Gr CU5MCuC: Engineering Reference Guide on Properties and Applications
Engineering and Technical Analysis of Cast Alloy A494 Gr CU5MCuC
Alloy A494 Grade CU5MCuC is a highly alloyed nickel-chromium casting composition designed for operation in aggressive environments with high corrosive potential. EV Group China's engineers and technologists use this material for manufacturing critical components where maximum resistance to sulfuric acid, phosphoric acid, and oxidizing media is required.
| Regulatory Documentation | Material Classification | Key Application Areas | Analogues according to EU Standards (EN) |
|---|---|---|---|
| ASTM A494 – Standard Specification for Castings, Nickel and Nickel Alloy | Austenitic corrosion-resistant nickel alloy | Production of cast pipeline fittings, including valves, flanges, and fittings, for systems operating with concentrated acids and aggressive chemicals. | CrNiMo 21-42-3, N08825 |
| ASTM A494 – Standard Specification for Castings, Nickel and Nickel Alloy | Austenitic corrosion-resistant nickel alloy | Production of cast pipeline fittings, including valves, flanges, and fittings, for systems operating with concentrated acids and aggressive chemicals. | CrNiMo 21-42-3, N08825 |
Chemical Composition Specification of Alloy A494 CU5MCuC (%)
The chemical composition of the alloy is balanced to achieve synergy between high mechanical properties and passivity in aggressive environments. Niobium (Nb) alloying stabilizes the austenitic matrix and inhibits intergranular corrosion processes, especially in the heat-affected zone of welds.
| C | <0.050 |
|---|---|
| Si | <1.0 |
| Mn | <1.0 |
| P | <0.030 |
| S | <0.020 |
| Cu | 1.5–3.5 |
| Mo | 2.5–3.5 |
| Ni | 38.0–44.0 |
| Cr | 19.5–23.5 |
| Cb (Nb) | 0.60–1.20 |
| Fe | Balance |
Mechanical Properties of A494 Gr CU5MCuC Castings at Room Temperature
The mechanical characteristics guarantee the structural integrity and durability of products under high pressure and cyclic loading conditions. EV Group China ensures full compliance with the minimum requirements of ASTM A494 for cast products:
| Minimum Tensile Strength (Rm), MPa | Minimum Yield Strength at 0.2% Deformation (Rp0.2), MPa | Minimum Elongation (A5), % |
|---|---|---|
| 520 | 240 | 20 |
Basic Physical Properties
The density of alloy A494 Gr CU5MCuC under standard conditions is 8.21 g/cm³. This fundamental parameter is used in strength and weight calculations during the design of equipment for the chemical, oil and gas, and energy industries.
Weldability and Technological Aspects
The alloy exhibits good weldability when using standard arc welding methods (GTAW, GMAW, SMAW). To prevent hot cracking and maintain the corrosion resistance of the weld joint, strict control over heat input and the use of welding materials corresponding to the base metal are necessary.
| Weldability Classification | Group according to ISO/TR 15608 | Classification according to ASME Section IX | |
|---|---|---|---|
| Weldability Classification | Group 45 | Welding Procedure Qualification (WPS) | Brazing Procedure Qualification (BPS) |
| Weldability Classification | Group 45 | P-Number: 45 | P-Number: 111 |
| Classification according to EN 13445 | Group according to ISO/TR 15608 |
|---|---|
| Classification according to EN 13445 | Group 43 |
| Classification according to EN 13445 | Group 43 |
Cross-Reference and Equivalents of Alloy A494 CU5MCuC
For unification and ensuring interchangeability in international projects, EV Group China technologists provide the following table of compliance for A494 CU5MCuC grade according to various global standards:
| Germany (DIN EN) | Japan (JIS) | United Kingdom (BS) | USA (ASTM / ASME) | China (GB) |
|---|---|---|---|---|
| NiCr21Mo, NiCr21Mo F59, 2.3858.10 | NAS 825, NCF825, CM2242-110 | NA 16 | 21-42-3, A 781 Grade CU5CMuC, C65MCuSiC | 0Cr21Ni42Mo3Cu2Ti, NS1402, NS142 |